FN2500161 Equivalent & Substitute Parts

Part Overview

The FN2500161 is a 25 MHz XO (Standard) CMOS oscillator manufactured by Diodes Incorporated, part of the SaRonix-eCera™ FN series. This surface mount crystal oscillator operates at 3.3V with Enable/Disable functionality, housed in a 4-SMD, No Lead package measuring 7.00mm x 5.00mm. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters align within the allowed specifications for this oscillator category, enabling direct replacement in applications requiring 25 MHz CMOS output with identical packaging and voltage requirements.

Key Parameters

Parameter	Value
Frequency	25 MHz
Output Type	CMOS
Supply Voltage	3.3V
Function	Enable/Disable
Package / Case	4-SMD, No Lead
Size / Dimension	7.00mm x 5.00mm
Mounting Type	Surface Mount
Operating Temperature Range	-40°C ~ 85°C
Frequency Stability	±50ppm
Current - Supply (Max)	15mA
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the FN2500161 are qualified based on the following critical parameters that must remain constant or within acceptable tolerance:

Frequency: 25 MHz (exact match required)
Output Type: CMOS (exact match required)
Supply Voltage: 3.3V (exact match required)
Function: Enable/Disable (exact match required)
Package / Case: 4-SMD, No Lead (exact match required)
Size / Dimension: 7.00mm x 5.00mm (exact match required)
Mounting Type: Surface Mount (exact match required)

Substitutes are grouped into three categories: Upgrade (improved frequency stability), Manufacturer Recommended (alternative series with modified operating temperature), and Direct (alternative manufacturer with equivalent specifications).

Parameter Comparison

Parameter	FN2500161	FN2500171	FNETHE025	SXO75C3A481-25.000M
Manufacturer	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated	Suntsu Electronics, Inc.
Frequency	25 MHz	25 MHz	25 MHz	25 MHz
Output Type	CMOS	CMOS	CMOS	CMOS
Supply Voltage	3.3V	3.3V	3.3V	3.3V
Function	Enable/Disable	Enable/Disable	Enable/Disable	Enable/Disable
Package / Case	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead	4-SMD, No Lead
Size / Dimension	7.00mm x 5.00mm	7.00mm x 5.00mm	7.00mm x 5.00mm	7.00mm x 5.00mm
Height - Seated (Max)	1.80mm	1.80mm	1.55mm	1.60mm
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-20°C ~ 70°C	-40°C ~ 85°C
Frequency Stability	±50ppm	±25ppm	±25ppm	±50ppm
Current - Supply (Max)	15mA	15mA	15mA	16mA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Bulk	Bulk	Tape & Reel (TR)	Bulk

Engineering Selection Recommendations

All substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory alignment with the FN2500161.

FN2500171 provides improved frequency stability at ±25ppm compared to the FN2500161's ±50ppm, while maintaining identical electrical and mechanical specifications. This upgrade option is suitable for applications requiring tighter frequency tolerance.

FNETHE025 is the manufacturer-recommended alternative from Diodes Incorporated's SaRonix-eCera™ ASSP XO™ series, offering ±25ppm frequency stability and reduced seated height of 1.55mm. This part operates within a narrower temperature range (-20°C ~ 70°C) compared to the FN2500161. Selection of FNETHE025 requires confirmation that the application's operating temperature requirements fall within this reduced range.

SXO75C3A481-25.000M is a direct substitute from Suntsu Electronics, Inc., maintaining ±50ppm frequency stability and full -40°C ~ 85°C operating temperature range. Maximum supply current is 16mA, which is 1mA higher than the FN2500161. This part is suitable for applications where manufacturer diversity is required while maintaining equivalent electrical performance.

Frequently Asked Questions (FAQ)

Q: Can FN2500171 be used as a direct replacement for FN2500161?

A: Yes. FN2500171 is electrically and mechanically equivalent to FN2500161 across all critical parameters: 25 MHz frequency, CMOS output, 3.3V supply, Enable/Disable function, and 4-SMD No Lead package. FN2500171 offers improved frequency stability at ±25ppm versus ±50ppm.

Q: What are the constraints for using FNETHE025?

A: FNETHE025 operates within the temperature range -20°C ~ 70°C, which is narrower than the FN2500161's -40°C ~ 85°C range. Applications requiring operation below -20°C or above 70°C must use FN2500161, FN2500171, or SXO75C3A481-25.000M. FNETHE025 is supplied in Tape & Reel packaging rather than Bulk.

Q: Is SXO75C3A481-25.000M compatible with FN2500161 designs?

A: Yes. SXO75C3A481-25.000M matches all critical electrical and mechanical parameters: 25 MHz, CMOS output, 3.3V supply, Enable/Disable function, and 4-SMD No Lead package. Maximum supply current is 16mA compared to 15mA for FN2500161. Applications with current budgets accommodating 16mA maximum draw are compatible.

Q: What is the difference in frequency stability between these parts?

A: FN2500161 and SXO75C3A481-25.000M specify ±50ppm frequency stability. FN2500171 and FNETHE025 specify ±25ppm frequency stability, providing tighter tolerance for applications requiring improved frequency accuracy.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. FN2500161, FN2500171, FNETHE025, and SXO75C3A481-25.000M are all ROHS3 compliant.

Q: Does package height affect substitution?

A: Package height differences exist: FN2500161 and FN2500171 are 1.80mm, FNETHE025 is 1.55mm, and SXO75C3A481-25.000M is 1.60mm. Applications with height constraints must verify clearance compatibility. All parts maintain identical 7.00mm x 5.00mm footprint dimensions.

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